Inversion and Effect Research on Dust Distribution of Urban Forests in Beijing
Urban forests affect the filtration and absorption of airborne particulate matter, which can minimize the harmful effects to human health caused by airborne particulate pollution. Evergreen plants in urban forests play a major role in absorbing dust and purifying the air, especially in winter. Study...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-05-01
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| Series: | Forests |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1999-4907/10/5/418 |
| _version_ | 1811267225976307712 |
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| author | Kai Su Qiang Yu Yahui Hu Zhili Liu Pengchong Wang Qibin Zhang Jiyou Zhu Teng Niu Depeng Yue |
| author_facet | Kai Su Qiang Yu Yahui Hu Zhili Liu Pengchong Wang Qibin Zhang Jiyou Zhu Teng Niu Depeng Yue |
| author_sort | Kai Su |
| collection | DOAJ |
| description | Urban forests affect the filtration and absorption of airborne particulate matter, which can minimize the harmful effects to human health caused by airborne particulate pollution. Evergreen plants in urban forests play a major role in absorbing dust and purifying the air, especially in winter. Studying the spatial distribution of leaf dust and exploring the dust retention effect of evergreen shrubs are important for scientifically guiding urban forest construction and improving the living environment of cities in winter. The purpose of this study was to establish a dust inversion model by correlation analysis of spectral reflectance and the amount of dust absorption (ADA) of vegetation, using Sentinel-2 satellite remote-sensing images to obtain the dust distribution of the evergreen vegetation (mainly <i>Euonymus japonicus</i> Thunb.) in the Beijing urban area, and to determine the effect of the spatial pattern of <i>E. japonicus</i> woodland on ADA intensity. The result showed that the red band and near-infrared band are most sensitive to dust. The normalized difference phenology index (NDPI) is more suitable for building an inversion model, where the determination coefficient (<i>R</i><sup>2</sup>) of the inversion model constructed by the ratio of the NDPI (R<sub>NDPI</sub>) was 0.879. The inversion results show that the mean ADA in the enclosed area is smaller than that in semi-enclosed and open areas, and the regional distribution of high ADA in the urban area of Beijing was higher in the south with a tendency of the ADA to decrease from city center to the surrounding area. The size, shape, and percentage of landscape (PLAND) of <i>E. japonicus</i> woodland have a significant effect on ADA intensity. We found that, in the study area, when the PLAND of <i>E. japonicus</i> woodland is higher than 40%, its ADA intensity remains basically unchanged. When the vegetation coverage is fixed, the landscape shape index is negatively correlated with ADA intensity, and reduction of the overall shape complexity of forestland can enhance its dust retention effect and improve the air environment of the surrounding areas. The results of this study can be used as a reference for urban planners and landscape architects when building urban forests, providing a scientific basis for controlling and reducing air particulate pollution in Beijing’s winter and improving the living environment. |
| first_indexed | 2024-04-12T20:57:34Z |
| format | Article |
| id | doaj.art-eeed17a8cd0b4c4ab9d37fef45bcdb31 |
| institution | Directory Open Access Journal |
| issn | 1999-4907 |
| language | English |
| last_indexed | 2024-04-12T20:57:34Z |
| publishDate | 2019-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Forests |
| spelling | doaj.art-eeed17a8cd0b4c4ab9d37fef45bcdb312022-12-22T03:16:56ZengMDPI AGForests1999-49072019-05-0110541810.3390/f10050418f10050418Inversion and Effect Research on Dust Distribution of Urban Forests in BeijingKai Su0Qiang Yu1Yahui Hu2Zhili Liu3Pengchong Wang4Qibin Zhang5Jiyou Zhu6Teng Niu7Depeng Yue8Beijing Key Laboratory for Precision Forestry, Beijing Forestry University, Beijing 100083, ChinaBeijing Key Laboratory for Precision Forestry, Beijing Forestry University, Beijing 100083, ChinaBeijing Key Laboratory for Precision Forestry, Beijing Forestry University, Beijing 100083, ChinaBeijing Key Laboratory for Precision Forestry, Beijing Forestry University, Beijing 100083, ChinaBeijing Key Laboratory for Precision Forestry, Beijing Forestry University, Beijing 100083, ChinaBeijing Key Laboratory for Precision Forestry, Beijing Forestry University, Beijing 100083, ChinaBeijing Key Laboratory for Precision Forestry, Beijing Forestry University, Beijing 100083, ChinaBeijing Key Laboratory for Precision Forestry, Beijing Forestry University, Beijing 100083, ChinaBeijing Key Laboratory for Precision Forestry, Beijing Forestry University, Beijing 100083, ChinaUrban forests affect the filtration and absorption of airborne particulate matter, which can minimize the harmful effects to human health caused by airborne particulate pollution. Evergreen plants in urban forests play a major role in absorbing dust and purifying the air, especially in winter. Studying the spatial distribution of leaf dust and exploring the dust retention effect of evergreen shrubs are important for scientifically guiding urban forest construction and improving the living environment of cities in winter. The purpose of this study was to establish a dust inversion model by correlation analysis of spectral reflectance and the amount of dust absorption (ADA) of vegetation, using Sentinel-2 satellite remote-sensing images to obtain the dust distribution of the evergreen vegetation (mainly <i>Euonymus japonicus</i> Thunb.) in the Beijing urban area, and to determine the effect of the spatial pattern of <i>E. japonicus</i> woodland on ADA intensity. The result showed that the red band and near-infrared band are most sensitive to dust. The normalized difference phenology index (NDPI) is more suitable for building an inversion model, where the determination coefficient (<i>R</i><sup>2</sup>) of the inversion model constructed by the ratio of the NDPI (R<sub>NDPI</sub>) was 0.879. The inversion results show that the mean ADA in the enclosed area is smaller than that in semi-enclosed and open areas, and the regional distribution of high ADA in the urban area of Beijing was higher in the south with a tendency of the ADA to decrease from city center to the surrounding area. The size, shape, and percentage of landscape (PLAND) of <i>E. japonicus</i> woodland have a significant effect on ADA intensity. We found that, in the study area, when the PLAND of <i>E. japonicus</i> woodland is higher than 40%, its ADA intensity remains basically unchanged. When the vegetation coverage is fixed, the landscape shape index is negatively correlated with ADA intensity, and reduction of the overall shape complexity of forestland can enhance its dust retention effect and improve the air environment of the surrounding areas. The results of this study can be used as a reference for urban planners and landscape architects when building urban forests, providing a scientific basis for controlling and reducing air particulate pollution in Beijing’s winter and improving the living environment.https://www.mdpi.com/1999-4907/10/5/418amount of dust absorptionurban forestlandscape metricsdust retention effectBeijing |
| spellingShingle | Kai Su Qiang Yu Yahui Hu Zhili Liu Pengchong Wang Qibin Zhang Jiyou Zhu Teng Niu Depeng Yue Inversion and Effect Research on Dust Distribution of Urban Forests in Beijing Forests amount of dust absorption urban forest landscape metrics dust retention effect Beijing |
| title | Inversion and Effect Research on Dust Distribution of Urban Forests in Beijing |
| title_full | Inversion and Effect Research on Dust Distribution of Urban Forests in Beijing |
| title_fullStr | Inversion and Effect Research on Dust Distribution of Urban Forests in Beijing |
| title_full_unstemmed | Inversion and Effect Research on Dust Distribution of Urban Forests in Beijing |
| title_short | Inversion and Effect Research on Dust Distribution of Urban Forests in Beijing |
| title_sort | inversion and effect research on dust distribution of urban forests in beijing |
| topic | amount of dust absorption urban forest landscape metrics dust retention effect Beijing |
| url | https://www.mdpi.com/1999-4907/10/5/418 |
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